Chicago Architectural Boat Tour, 90-minute duration, daytime or evening cruise, slow-moving boat, professional guide, historic buildings, modern skyscrapers, Willis Tower, Navy Pier, Chicago River, Lake Michigan, cityscape views, reflection of buildings on water, sunny or cloudy sky, gentle waves, calm atmosphere, informative commentary, seated passengers, life jackets, wooden benches, metal railings, nostalgic vibe, educational experience.